Valve-gear for pumping-engin es



(No Model.) 3 SheetsSheet 1.

M. MISIG & E. SCHWEIZER. VALVE GEAR FOR PUMPINQ ENGINES.

No. 409,854. Patented Aug. 27, 1889.

E un 0 III W/T/VESSES: I l/VVE/VTORs wi /WK \JMW v @M I BY Arrofis' (NoModel.) 3 Sheets-Sheet 2.

M. MIS'IO & E. SGHWEIZER. VALVE GEAR FOR PUMPING ENGINES.

No. 409,854. Patented Aug. 2'7, 1889.

WITNESSES.-

v jm/rom ATTORNEYS,

(No Model.) 3 Sheets-Sheet 3.

M. MISIG & E. SOHWEIZER. VALVE GEAR FOR PUMPING ENGINES.

No. 409,854. Patented Aug. 27, 1889.

U ITED SrATns Parana FFICE.

MICHAEL MISIC AND EDUARD SOHYVEIZER, OF BROOKLYN, NEW YORK.

VALVE-GEAR FOR PUMPING-ENGINES.

SPECIFICATION forming part of Letters Patent No. 409,854, dated August27', 1889.

Application filed May 1, 1889. Serial No. 309,294. (No model.)

To all whom it may concern:

Be it known that we, MICHAEL MIsIC and EDUARD SOHWEIZER, both ofBrooklyn, in the county of Kings and State of New York, citizens of theEmpires of Austria-Hungary and Germany, respectively, have inventedcertain new and useful Improvements in Valve- Gears for D uplex Pu mping-En gines, of which the following is a specification.

This invention relates to an improved valvegear for duplexpumping-engines, said valvegear actuating alternately the oscillatingslide-valves of the steam-cylinders by which the pumps are operated; andthe invention consists of an improved valve-gear for steamcylinders ofduplex pumps, which valve-gear will be fully described hereinafter, andfinally pointed out in the claim.

In the accompanying drawings, Figure 1 represents a side elevation of aduplex pump in g-engine arranged with our improved valvegear. Fig.2isaplan of Fig. 1, and Fig. 3 avertical longitudinal section throughone of the pumps and the corresponding steam-cylinder and steam-chest.Fig. 4 is an end elevation of the steam-cylinders and steam-chest; andFig. 5, a vertical transverse section of the same on line a cc, Fig. 2.Fig. 6 is a detail horizontal section, drawn on alarger scale, of thesteamcylinders and their steam-supply and exhaust-- channels. Figs. 7,8, 9, and 10 are details of the cams for operating the oscillating valveof one steam-engine, and Figs. 11 and 12are details of the cams foroperating the oscillating valve of the other steam-cylinder.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A A are the steam-cylinders, and B B thepump-cylinders, of our improved duplex pumpingengine. Midway between andabove the steam-cylinders is supported a cylindrical valve-chest C,which is provided at the interior with two independently-oscillatingvalves D D, which are supported by an interior circumferential shoulder66, as shown clearly in Fig. The

steam chest is supplied with live steam through a supply-pipe B and aninverted-T- shaped channel B in the upper dome-shaped part of thesteam-chest 0. Each valve D is provided with a spindle D, which pass inopposite directions to each other through stuifing-boxes in the oppositeheads of the steam chest to the outside of the same, each spindle beingprovided with a fixed crank-arm e, which is connected by a pivot-link cwith a crank-arm c that is securely attached to a longitudinal cam-rod Eor E which turns in suitable bracl et-bearings E attached, respectively,to the steam-cylinders A A and the pump-cylinders B B, as shown in Figs.1, 2, and 3.

The piston-rods B of the steam and pump pistons A B are guided instuffing-boxes ot' the heads of the steam and pump cylinders A and B andprovided with upright pillars F, which are firmly clamped to thepiston-rods B and provided at their upper ends with avertically-adjustable spindle f, that carries an axially-turningdisk-shaped head f, which can act on the cams that are attached to theopposite ends of the rocking cam-rods E E, so that the heads f of thepillars F impart by contact with the said fixed cams on the cam-rods E Ean oscillating motion to the cain-rods E, and by the crank-connectionwith the oscillating valves oscillating motion to the latter. The playof the pistons of the steam and pump cylinders takes place alternatelywith thatof the adjoining set of steam and pump cylinders, whereby theoscillating slide-valves are correspondingly shifted, so as to producethe required course of live and eX- haust steam from the inlet-ports ofthe steamchest to the steam-cylinders and from the outlet-ports of thelatter to the exhaust-ports of the stea1n-chest.

Each oscillating valve D is provided with a central circumferentialrecess (1 which forms a channel by which the live steam passes from thechannel in the dome-shaped top to the ports of the steam-cylinders. Eachvalve D is provided in its middle thinner part with a diametrical recessor slot d for the shank of an inverted-T-shaped valve D said valve beinglarge enough to connect the central exhaust-channel m with one of theadjoining steam-channels m at each side of the same, as shown in Fig. 5,so that simultaneously the inlet of live steam and the outlet ofexhauststeam fromeach cylinder takes place. The base of the steam-chestO rests on transverse ribs C connecting the steam-cylinders, as shown inFig. 6, the steam-channels leading to opposite ends of thesteam-cylinders communicatin g with said transverse ribs, as shown inFig. 6. The arrangement of the steamchannels by which the opposite endsof the steam-cylinders are connected wit-h the steam chest and theoscillating valves of the same are Well known and form no part of ourinvention, and do not require further description.

The spindle of the inner valve D extends through the inner end of thesteam-chest C and is connected with the corresponding camrod E, whichcam-rod is provided with fixed cams g, having tapering edges, these camsg being keyed to opposite endsand sides of the cam-rod E, as shown inFig. 2. The reciprocating motion of the head f of the correspondingpillar F exerts a direct action on the cams g, and thereby causes theirmoving in one direction, and also causes the oscillating motion of thecam-rod E in the same direction, and when moving in the oppositedirection the pillar F causes the sideward motion of the cams g in theopposite direction,

and thereby the alternate oscillating motion of the inner oscillatingvalve D. The outer valve D is connected with its cam-rod E at the outerend of the steam-chestand requires different cams than the inner valveD, so as to produce the proper oscillating motion of the said-outervalve D. For this purpose the cams h for the outer valve D are hinged insuch a manner that the head of the corresponding pillar F, when movingin one direction, first lifts the hinged cam 71, so as to pass beyondthe same, while by the return motion of the pillar its head f engagesthe inner inclined edge of the hinged cam h, and produces thereby thesideward motion of the cam and the axially-turning motion of the cam-rodE, so as to impart by the pivoted connection with the valve acorresponding oscillating motion to the latter. Vhen the pillar Farrives at the opposite end of its stroke, it lifts the hinged cam, h atthe opposite end of the cam-rod E, passes beyond the same, and oplationof the valve. whichis operated from the piston of the righthandcylinder, (looking from the rear,) con.- trols the admission and exhaustof steam in the left-hand cylinder, and vice versa. The front valve D,which is operated from the piston of the left-hand cylinder, controlsthe admission and exhaust of steam in the righthand cylinder, as isshown by the dotted channels in Fig. 6. In this manner the valves D areoperated. alternately by the engagement of the pillars with fixed andhinged cams on the cam-rods E E, whereby steam is admitted to andexhausted in such amanner that the alternate play of the steam-pistons,and consequently the alternating strokes of the pump-cylinders, areproduced.

The cams g g and h h are provided with collars, so that they can befirmly attached to the cam-rods by set-screws passing through saidcollars, and by which also the proper po- :of the said valves, spindlessecured to the oscillating valves and passing through opposite :heads ofthe steam-chest, cam-rods supported in bracket-bearings, acrank-connection be- 1 tween thespindles of the valves and the camrods,fixed cams applied at opposite ends and sides of one cam-rod and hingedcams applied at opposite ends and sides of the other cam-rod, uprightpillars attached to the piston-rodsof the steam and pump cylinders andprovidedwith heads at their upper ends for engaging. said cams andimparting oscillating motion to the slide valves, substantially as setforth.

In testimony that We claim the foregoing. as our. invention We havesigned our names in presence of twosubscribing witnesses. crates thecam-rod by its next forwardmotion, so as to produce the correspondingoscil- The rear steam-valve D,

MICHAEL MISIO. EDUARD SCHWEIZ'ER.

Witnesses MARTIN PETRY, JOHN ALONZO. STRALEY.

